Combined lock and latch



(No Model') U D MIHILLS CMBINED LOK ANU LATCH.

No. 534,276. 'Patented Feb. 19, 1,895.

NITED STATES PATENT OFFICE,

URIAH D. MIHILLS,IOF FOND DU LAC, WISCONSIN.

COMBINED LocK ANDy LATCH.

SPECIFICATION forming part of 'Letters Patent No. 534,276, datedFebruary 19, 1895. Applicationfiled .Tune 20,1894. Serial No. 515,1'75(No model.)

To all whom t may concern:

Be it known that I, URIAH D. MIHILLS, Ia citizen of the United States,residing atFond du Lac, in the county of Fond du Lac and State of\Visconsin,haveinvented a new and useful Combined Lock and Latch,of'which the following is a specification.

The invention relates to improvements ,in combined locks and latches.

The object of the present invention is to improve the construction ofcombined locks and latches, and to provide an exceedingly simpleandinexpensive one, which maybe.

readily applied to either side of a door, and which will notproject fromthe face of the door like a rim lock or require the mortise of anordinary mortise lock.

The invention consists in the construction and novel combination andarrangement of parts hereinafter fully described, illustrated in theaccompanying drawings, and pointed out in the claims hereto appended.

In the drawings: Figure l is an elevation of a portion of a doorprovided with a cornbined locky and latch constructed in accordance withthis invention, the front or face plate being removed. Fig. 2 isahorizontal sectional view, showingthe key turned for locking the boltagainst inward movement. Fig. 3 is a detail perspective View of thebolt.

Fig. 4 is a Vertical sectional view of the lock.

Like numerals of reference indicate corresponding parts in all theigures of the drawings. I

l designates a lock casing, which is approximately Tshaped, and which islet into a recess in the face of a door 2, and which is prol vided witha removable front orface plate 3,

which extends over the door adjacent tothe recess thereof, and which isprovided with a flange 4 arranged at right angles, and located on theedge of the door, and provided with a bolt opening. This front plate isrectangular,

is provided with an integral yoke 7 which is reduced at opposite sidesto form end lugs 8; and these reducedY portions or sides of the yoke fitin bifurcations, openings or recesses in opposite arms 9 of a hub 10,which is engaged by the knob spindle in thevusual lmanner, whereby whenthe knob is turned, the bolt will be retracted against the action of aspring 11. The Spring is approximately ellip 6o tical. It is located inthe wider portion of the T-shaped casing, and its ends 12 are locatedopposite eachother, and extend toward the front of the lock, and engage.notches 13 of the lugs, or rather the ends of the sidesof the yoke.This elliptical spring is centrally supported at its rear side by a lug14 of the lock casing., It bears loosely, that is, without a rivet orsimilar fastening device, against the rear side of the lug and is heldagainst the 7.o

-saule by a strip l5 of Wood or other suitable material, whichwill notwear the spring. This 'strip 15 forms at the rear end of the casingacentral convex fulcrum or bearing for the elliptical spring, and alsoprovides concave end recesses for the reception of the end portionsofthe spring. By this arrangement the strain on the spring is equallydivided, and it cannot become broken as readily as springs that are-fas'tened at one end, and are bent 8o against a lug or other support,as these generallybreak at the pointof contact with such support.

The bolt is provided intermediate of its ends with a circular opening 16receiving a 85 key 17, which is permanently swiveled to the front plateof the lock casing, and which is adapted'to have its lug turned forwardto be engaged by the front of .the` bolt to prevent to support the lugof the key when in position 95 f for locking the bolt, to prevent thelug from swinging downward through the force of gravity and releasingthe bolt. The longitudinal stop piece is changed from one set of notchesto the other, in order to bring it at the roo bottom of the bolt-whenthe lock is changed from one side of a door to the'other.

The key is preferably constructed of a single piece of stout wire bent,as shown, to form the lug and the handle portions.

The casing is provided at opposite sides with perforations to receiveone end of the key, and theinner terminal of the shank. The lug islocated between the sides of the casing, and the shank is bent to forman exterior loop, which bears against the adjacent side of the casing,whereby the latch key or catch 17 is permanently mounted on the casing.

It will be seen that the combined lock and latch is simple andcomparatively inexpensive in construction, that it is adapted to beconveniently applied to a door Whether the same be thick, or too thinfor an ordinary mortise lock, and that it may be readily arranged oneither side of the door. It will also be apparent that this arrangementwill shorten the spindle of a knob, and thereby lessen the cost of thesame; and by balancing the spring in the manner shown its durability isgreatly increased.

Changes in the form, proportion, and the minor details of constructionmaybe resorted to Without departing from the principle or sacrificingany of the advantages of this invention.

That I claim isM y 1. In a combined lock and latch, the combination of aspring` actuated bolt having an opening and provided at the top andbottom of the same with opposite notches, a reversible longitudinal stoppiece adapted to fit in either set of notches to permit a reversal ot'the lock and latch, and a key arranged in the opening of the bolt andadapted to be turned longitudinally of the same to prevent the boltmoving inward and arranged to be supported by the stop piece,substantially as described.

2. In a combined lock and latch, the combination of: a bolt having anopening, a key having its lug located in the opening ot' the bolt andadapted to be turned algainst the front side of the opening, and areversible stop piece arranged in the opening of the bolt for supportingthe lug of the key and adapted to permit the lock and latch to bereversed, substantially as described.

3. In a combined lock and latch, the combination of a casing provided atits rear end with a central convex fnlcrum and having recesses atopposite ends of the same, a lug 1ocated in advance of the fulcrum, abolt slidingly mounted in the casing and provided at its rear end with ayoke, the approximately elliptical spring having its straight sidearranged between the lug and the fulcrum and having its terminalsengaging the ends of the yoke, the end portions ot' the ellipticalspring being disposed opposite the said recesses of the casing, andmeans for operating the bolt, substantially as described.

4. In a combined lock and latch, the combination of a casing, a boltslidingly mounted therein and terminating at its inner end With a yokehaving thesides thereof reduced forming end lugs and provided withnotches, a hub having the ends of its arms bfurcated and receiving thereduced portion of the yoke, and the elliptical spring centrallysupported and having its ends terminating opposite the sides of the yokeand engaging the notches thereof, substantially as described.

5. In a combined lock and latch, the cornbination of a casing providedwith oppositely disposed perforations, a bolt mounted in the casing, andapermanently mounted latch key or catch constructed of a single piece ofwire folded or doubled intermediate of its ends to form a lug, andhaving one end and its shank journaled in said perforations, the shankot the key or catch being located on the exterior' ot the casing andbent to form a loop bearing against the adjacent side of the casing,substantially as described.

In testimony that I claim the foregoing as my own I have hereto atlixedmy signature in the presence of two witnesses.

URIAII D. MIHILLS.

Witnesses:

MINA M. MIHILLS, LIBBIE L. HOWARD.

